Property taxes are often the most underestimated cost of homeownership, and they vary dramatically by location. The same $400,000 home costs $10,000/year in property tax in Texas but only $1,800/year in Hawaii. Nationally, the average effective property tax rate is about 1.1% of assessed value, but rates range from 0.27% in Hawaii to 2.47% in New Jersey. This calculator estimates your annual property tax based on your home value and location, which is critical information when budgeting for a home purchase or comparing the true cost of living between areas.
Property Tax Calculator
How to Use This Calculator
- Enter your home's assessed value — check your county assessor's website for the official number, which may differ from market value
- Select your state or enter your local tax rate if you know it
- View your estimated annual property tax and monthly equivalent
- Compare rates across different locations if you are deciding where to buy
- Factor this number into your total monthly housing cost alongside mortgage, insurance, and maintenance
How It Works
This property tax calculator uses established formulas to provide accurate results.
The basic rule:
- Annual Property Tax = Assessed Value × Tax Rate
- Assessed Value = Home Value × Assessment Ratio
- National average effective property tax rate: ~1.10%
Real estate values and regulations vary significantly by location. Work with a local agent or attorney.
Tips & Considerations
- Assessed value and market value are often different. Many counties assess at 80-90% of market value, and reassessments happen on varying schedules.
- Property tax can increase significantly after a home sale when the property is reassessed at the new purchase price. California's Prop 13 is the notable exception.
- Homestead exemptions can reduce your taxable value by $25K-$75K depending on the state. Make sure to apply after purchasing.
- Property tax is deductible on federal taxes up to $10,000 combined with state income tax (SALT cap). This limit hits hard in high-tax states.
Frequently Asked Questions
Which state has the highest property tax?
New Jersey consistently has the highest effective property tax rate at approximately 2.23%, followed by Illinois at 2.07% and Connecticut at 2.15%. On a $350,000 home, New Jersey property taxes would cost roughly $7,800 per year compared to about $980 in Hawaii, which has the lowest rate at 0.28%. These rates are averages and can vary significantly by county and municipality.
How is property tax assessed?
Your county assessor determines your home's assessed value, which may differ from market value depending on your state's assessment ratio. Some states assess at full market value (100%), while others use a fraction. Tax bills equal the assessed value multiplied by the local mill rate (tax rate). Reassessments happen on varying schedules — some states reassess annually, others every few years.
Can I appeal my property tax assessment?
Yes, homeowners can appeal if they believe their assessed value is too high. Start by reviewing your assessment notice and comparing with recent sales of similar homes. File a formal appeal with your county assessor or board of review within the deadline (usually 30-90 days after notice). About 30-40% of appeals result in a reduction, so it is often worth pursuing if you have evidence of overvaluation.
Are property taxes tax deductible?
Yes, property taxes are deductible on federal income tax returns if you itemize deductions. However, the 2017 Tax Cuts and Jobs Act capped the State and Local Tax (SALT) deduction at $10,000 total ($5,000 if married filing separately). This cap includes both state income tax and property tax combined, which limits the benefit for homeowners in high-tax states.
Do property taxes go up every year?
In most states, property taxes can increase annually as home values rise and local governments adjust mill rates. Some states have caps — California Proposition 13 limits annual increases to 2% of assessed value until the home is sold. Texas has a 10% annual cap on homestead appraisal increases. Without such caps, taxes can jump significantly in hot housing markets.